Capacitor C1,C2, C3 having capacitant of 3UF, 18UF and 6UF respectively. Connect them so that their total capacitant is a). 24UF b). 6UF c). 4.7UF d.) 1.8UF
in parallel, C = 3+18+6 uF
in series, 1/C = 1/3 + 1/18 + 1/6; C = 9/5 = 1.8 uF
Now play around with having two in parallel in series with the other, or two in series, in parallel with the other.